Which electron configuration represents the

electrons of an atom in an excited state?

(1) 2-1

(3) 2-8-7

(2) 2-7-4

(4) 2-4

Question

Ashleigh Berry

Chemistry

18 April, 17:28

Which electron configuration represents the

electrons of an atom in an excited state?

(1) 2-1

(3) 2-8-7

(2) 2-7-4

(4) 2-4

+3

Answers (1)

Know the Answer?

Pebbles · Answer 1

3) 2-8-7

Explanation:

An atom is in an excited state when it is very close to having a full octet (either it gains or loeses electrons to get a full octet). The first shell should have two electrons and the next one and the one after that should be eight. Since the third shell has 7 electrons it needs to gain one more electron to get a full octet. Therefore the answer is 3

Which electron configuration represents theelectrons of an atom in an excited state?(1) 2-1(3) 2-8-7(2) 2-7-4(4) 2-4

Which electron configuration represents the

electrons of an atom in an excited state?

(1) 2-1

(3) 2-8-7

(2) 2-7-4

(4) 2-4